To add to this - I was perusing the thread before getting home to open up another Speedy incoming with its 7912. This made me curious, so I got all six of my #6 end links out. All three straight lugs came with their original bracelets. The #6's from my 2998-62 and 105.003-64 have the grooves, while my 105.003-65 is flat.
I should have put these chronologically, but from top-to-bottom, these match up with my 105.003-64, 105.003-65, and 2998-62
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